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Vacation
When you leave on vacation, turn off the humidifier water supply and your humidity
control. Turn on the humidifier water supply and reset your humidity control when
you return.
CHECKING YOUR HUMIDIFIER OPERATION
After winter startup or maintenance, use the following steps to check the humidifier
operation:
1. Turn on the humidifier water supply.
2. Be sure the humidifier has power, and plug in the humidifier.
3. Turn the Automatic Humidity Control to the Test setting. The underwater heater
starts to heat the reservoir water.
NOTE: If relative humidity is above 45% in the home, or the outdoor temperature is
above 50°F, a jumper may need to be placed across the humidistat's OUT
terminals to perform this checkout.
4. Check that the furnace blower turns on to circulate the moist air. The blower may
take as long as fifteen minutes before it turns on.
5. Reset the Automatic Humidity Control to the desired dial setting.
TROUBLESHOOTING
Problem
What To Look For
Low humidity Humidifier heater is
not operating.
Rapid air changes.
Drafts (cold air is
dry and is an added
load for the
humidifier).
High humidity Condensation on
walls.
Heavy
condensation on
windows.
HE420A STEAM POWER HUMIDIFIER
• Confirm that humidifier is plugged in.
• Set the humidistat higher.
• Check for low water level.
• Reset circuit breaker or check for blown fuse.
• Check that the furnace power is on.
• Check all external wiring connections.
• Check the humidity control setting.
• Call a professional heating contractor.
• Keep doors and windows closed.
• Close fireplace damper when not in use.
• Keep exhaust fan running time to a minimum.
• Seal around doors and windows.
• Turn off the humidity control and water until
condensation is completely evaporated.
• Turn humidity control down low enough to
eliminate condensation caused by moisture
from bathing, mopping, cooking, etc. If
moisture persists, more ventilation is needed.
7
What To Do
69-1112—2
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